
Blue Marsh Lake
The Army Corps lake northwest of Reading, built over a flooded 18th-century village.
- 8 ft · first step
- 16 ft
- 24 ft
- 32 ft
- 39 ft
- 47 ft · bottom
About Blue Marsh Lake
Blue Marsh Lake was built by the Army Corps of Engineers northwest of Reading, damming Tulpehocken Creek; construction began in 1974 and the lake was filled by 1979 as part of Delaware River basin flood control. It covers 1,147 acres in western Berks County, submerging the old village of Blue Marsh, once known as Pleasant Valley and settled since the 1700s — the Gruber Wagon Works building was moved to safety before the water rose and can still be visited nearby. A single large island sits near the lake's center. Swimming, fishing, boating and 36 miles of shoreline trails make it one of Berks County's main recreation spots.
- 8 shore towns named, with a star on each
- 85 roads engraved around the shore, 13 of them labeled
- 6 depth layers, each step engraved with its depth in feet
- Compass rose, title block with coordinates, max depth and area; keyhole hanger on the back
Turn it in your hands
Live 3D of the actual cut files — drag to orbit, pinch to zoom. Every road you see is engraved on the real thing.
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